<template>
    <el-container class="home-container">
        <!-- 头部区域 -->
        <el-header>
            <div>
                <img src="../assets/logo.png" alt />
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button>
        </el-header>
        <el-container>
            
            <!-- 侧边栏 -->
            <el-aside :width="Iscollapse?'64px':'200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <!-- 侧边栏菜单 -->
                <el-menu
                    background-color="#333744"
                    text-color="#fff"
                    active-text-color="#ffd04b"
                    unique-opened
                    :collapse="Iscollapse"
                    :collapse-transition="false"
                    :router="true"
                    :default-active="activePath"
                >
                    <!-- 一级菜单 -->
                    <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
                        <!-- 一级菜单模板 -->
                        <template slot="title">
                            <!-- 图标 -->
                            <i :class="iconsObj[item.id]"></i>
                            <!-- 文本 -->
                            <span>{{item.authName}}</span>
                        </template>
                        <!-- 二级子菜单 -->
                        <el-menu-item
                            :index="'/'+subItem.path"
                            v-for="subItem in item.children"
                            :key="subItem.id"
                            @click="saveNavState('/'+subItem.path)"
                        >
                            <!-- 二级菜单模板 -->
                            <template slot="title">
                                <!-- 图标 -->
                                <i class="el-icon-menu"></i>
                                <!-- 文本 -->
                                <span>{{subItem.authName}}</span>
                            </template>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <!-- 主体区域 -->
            <el-main>
                <router-view></router-view>
            </el-main>
        </el-container>
    </el-container>
</template>
<script>
export default {
    data() {
        return {
            menuList: [],
            iconsObj: {
                125: 'iconfont icon-user',
                103: 'iconfont icon-tijikongjian',
                101: 'iconfont icon-shangpin',
                102: 'iconfont icon-danju',
                145: 'iconfont icon-baobiao'
            },
            Iscollapse:false,
            activePath:''
        }
    },
    created() {
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods: {
        logout() {
            // 清除token
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        async getMenuList() {
            const { data: res } = await this.$http.get('menus')
            if (res.meta.status !== 200)
                return this.$message.error(res.meta.msg)
            //很重要，这样赋值前端才能拿到数据
            this.menuList = this.menuList.concat(res.data)
            // console.log(this.menuList)
        },
        toggleCollapse(){
            this.Iscollapse=!this.Iscollapse
        },
        saveNavState(path){
            window.sessionStorage.setItem("activePath",path)
            this.activePath=path
        }
    }
}
</script>
<style lang="less" scope>
.home-container {
    height: 100%;
}
.el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size: 20px;
    > div {
        display: flex;
        align-items: center;
        img {
            height: 60px;
        }
        span {
            margin-left: 15px;
        }
    }
}
.el-aside {
    background-color: #333744;
}
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    cursor: pointer;
    letter-spacing: 0.2em;
}
.el-main {
    background-color: #eaedf1;
}
.el-menu{
    border-right: none !important;
}
</style>